Pipe connecter



PIPE CONNECTER Filed Feb. 2o. 1926 2 sheets-"sheet 1V v Nov. 19, 1929. v

w. GOETZELMAN PIPE CONNECTER Filed Feb. 20. 1926 2 Sheets-Sheet 2 y g//Qf Patented Nov. 19, 1929 -iJNfi'i.l-.1 sriviasu PATENT joFFicii.

WILLIAM eon'rznLmAN, or cHIcAGo, ILLINoIs, AssiGNo'n To APrLEToN ELECTRIC COMPANY, A coiaPoitA'rIoN or ILLINOIS PIPE coNNE'rER l e Application filed February ao, 1926. seal no. 89,555.'

The wires'lof lighting and power systems distributed throughout buildings are carried *through protecting conduits between inlet and outlet boxes and, specifically considered, the present invention relates to themeans for attaching the conduits to said boxes, although it is also useful in other fields. l The invention' relatesparticularly, to connections between metalpipes and boxes or other devices,

and has for its object to produce a simple and reliable connection that does not require th cutting of threadson the pipes. v

f to produce japan'ned metal pi electrical connection between the pipe and A further object of the present invention isv a simple and novel connection bethreaded painted, enameled or e which will insure a good tween an said device.

A further-object of the present invention isto produce asimple andjnovel sealed connection kbetween an unthreaded pipe`and another device. At the point where a cablepasses outIf a lconduit intoa box, means-must be provided to protectthe cable from being injured by the sharp edge on the pipe. One ofthe obvjects of the resent invention is to produce a simple an novel attachment to be placed in an inlet or outlet box adjacent to the end of a pipe connected thereto, to afford a smooth and rounded surface orengagement with vthe cable.

The various features of novelty whereby lmy invention is characterized will hereinafter be pointed out with particularity in the claims; but, for a full understanding ofiny invention and of its objects'and advantages,

the pipe andthe'wedging connection ring bein shown in elevation; Fig. 5 1s a section talen approximately on line 5-5 of Fig. 4; Fig. 6 is a section on a still larger .scale on a plane containing the long axis of the pipe, showing a fragment of the joint or connection; Fig. 7 is a section, on the vsaine scale as Fig. 6, through the wedging ring; Fig. 8 is a plan view of a modified form condition; Fi 0. 19 is an edge view of the ring illustrated in Fig. 8; Fig. 10 is an end view of the ring shown in Fig. 9; and Fig. 11` is an edge view of a fragment of a ring somewhat diiferent from that shown in Figs. 8 to 10.

ln Fig. l of the drawings, A represents a box to which are connected three pipes 1, 2 and 3." The box is provided with externall threaded nipples 4 towhich the several pipes are coupled'. In Figs. 2 vand 3 there is shown a common form of outlet box B to which are connectedtwo pipes 1 and 2, this box having nipples siinilar,v to those in Fig. 1, to which L dicated at 5. A divided or split ring 6 having` a taper 7 at one end is slipped over the pipe, the tapered portion entering the flaring mouth 4in the nipple. The taper on the' of wedging ring in a'lattened or developed ring is less sharp lthan the taper within the i nipple, so the nipple it is engaged by the latter only that when the ring is pushed into Y about the thinportion at "the extreme margin of thevring. On the other end of the ring there is a second tapered portion 8 that lis preferably' sharper or steeper than the taper' 7. .The ring is forced into the nipple by- Ameans of a coupling sleeve 9 screw-threaded upon the nipple and having an internal in-v clined face or fillet 10 complementaryto the taper 8 onA the ring.

To secure the pipe in irst slipped on is put in' placa place, the sleeve 9 is The' endof the pipe is' then the same, and then the ring. v

insrted in the nipple and the coupling sleeveis moved along the pipe until its threads may toward the latter until the advancingjapered endf-of the ringengages the taper with- Yin the nipple. The` advanced end of the ring is comparatively thin and, as pressure is applied to it by the nipple, in a. direction tending to reduce its diameter, its sharp edge will be bent inwardly toward the long axis order to secure an effective seal by i of the ring as shown in Figs; 8V to 10, I prefer v so to shape the ring that its ends arev slight- Iy helical. In other words, the overlapping end pieces 18 and 19 have a combined width,

:in the direction of the length of the ring, slightly greater than the length .of the ring at other points.v The vresult is 'that the tapered part 7 on one side of and adjacent-,to the gap in the ring and the tapered part 10 on the other side of the gap engage the nipple and the coupling sleeve, respectively, be-

of the pipe, causing it to bite as indicated at fore the remaining portions of the tapers 11, mto'the Surface 0f the plpe. -Tl1e1`e WlllY touch the seats on those parts. The result is be an appreciable bodily, movement of the ring -while the deiecting of its sharp edge is taking place, and vtherefore this sharp edge will cut through the enamel` or other 'pro- `tectivejcovering on the pipe and will enter the metal so .as/to form a good electricallyconductive contact with the pipe.' During the fastening operation, the clamping ring as awhole is being compressed into a smaller diameter, whereby it is caused to grip the .25 pipe-with a strong preure and thus securely lock the pipe against withdrawal.

The device for holding a cable that passes i Vthroughthe pipe out of contact with-the sharp 'edge at the end of the pipe, consists of a ring 12,U-shaped in cross section, fitted the `box in a position to form an abutment for the inner end of the pipe; vthe internal diameter of the ring le than the internal diameter of the pipe. The ring ifsfconveniently formed from a blank comprising a short tube having at one end an outwardly directed jlange. 13 whose external Y i diameter is greater than the diameter of the a.v straight 'line-parallel the of the opening through the nipple. AThis sleeve is inserted into the nipple from the box, with Y the resting against e inner Side of the box. The outer end ofthe sleeve is thenworked so as to `it laterall in the form of.a second flange 14. Wi i the nipple is a shallow annular groove 15, in-positio'n to receive theedge of the ange ILand lock the completed ring in PlacevInstead of divid1ng the pipe, as shown in Fig. 4, the d1- vlslon may along a staggered line. Thus inFigs. '8, 9 and 10 there is shown a clamping tapered ends 7v and 10.

YThemeetmg"ends of the ring are formed'to overlp the ring being cut half way through fmm @Lose Sides along lines aispha nnthe ring with respect to eachother,

by a dividingcut along z line 1.7 that exin the circumferential direction. In

the 'vement shown in Fig. 4, the joint. Vbetween lthepipe and the box is not sealed,

becausethereisa v fromtheinterior of'thcbox and along' monter side ofthe 10% -n'ection being connected at their inner ends Y that the members .18 and j19are pressed tlghtly together and form an efective seal when. the coupling sleeve is tightened 0nsite direction, to bite into the surface of the' o pipe when the coupling sleeve is tightened.

In Fig. 1'1, the ring 22 has the sharp cor- 11ers bent'iin opposite directions, to enable it to serve as arlck washer, throughv a tooth 23 that extends inwardly from the ring an'd a second tooth 24 that projects outwardly.

One of these teeth will bite into the pipe, and'` the other will bite into one of the members surrounding the ring., As the rings shown in Figs. 8 to 11 are forced along the pipe, while being contracted by the inclined bearing seats in the nipple and the couplingsleeve, the sharp bent corners or teethwill scrape the enamel from the pipe .and this enamel will enter the gapsn the ring beside the teeth. Thus provision vis made to take care of thedoosened enamel and, if there is enough Aof the V1atter,.it will fill thecgaps and add to the effectiveness of the seal between the ipe and the nipple. A Y

It will us be seen that I have roduced a Yquiclxly-applied and. quiclrly-detac able conbetween ,and a box or a. le; which Aconnection is not only secure but airds good electrical conductivity between `the parts 'even though the pipe be enamelled or coated with other non-conductingmaterial. It will also'be seen that I have produced a 'simple and'novel device for proa cable at the point where it leaves p Y a pipe and mtersjabox.'

particularity only a single preferred'form of myinvention, with-'a few simple modifica- .struetural details thus and' described;but intend to cover all forms and arwhilel hm musa-ated .ma aeseribed with' rangements come witbinthe tions,Idonot desiretobelilited to theex'act offmy invention constituting the appended claims. S

I claim: 1. In combination, an externally threaded tubular memberterminating atone end in a -frusto-conical mouth, a cylindrical member extending into said mouth, a divided ring surrounding said cylindrical member,A they ends of sai ring bein tapered in opposite directions, the taper o that end towardsaid tubular member bein at a lesser angle than i that of the said molutr and terminating in a thin edge, and a ycoupling sleeve surrounding said cylindrical member and engaged with 15 the threads on the tubular member, said sleeve having an internal bearing seat engaged with the tapered part of the outer end of said ring to force the ring into said mouth and to`cooperate with said mouth to contract the ring upon said cylindrical member.

2. In combination, an externally-threaded f tubular member terminating at one end in a frusto-conical mouth, a cylindrical member extending into said mouth, a divided ring Vsurrounding said cylindrical member, the inner end of the rin being tapered at a lesser angle than that o said mouth and terminating in a thin-edge, a coupling sleeve surrounding said cylindrical member and engaged with v 3o the threads onthe tubular member, and cof Ioperating elements on said sleeve and said,

ring whereby the sleeve acts simultaneously to compress the ring and force it into said mouth until said thin edge is turned and bites into said cylindrical member.

, In testimony whereof, I sign this specification.-

' GOETZELMAN. 

